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    <title>Document</title>
    <script>
        //1.利用函数求任意两个数的和
        // function getSum(num1,num2) {
        //     console.log(num1+num2);
        // }
        // getSum(1,3);
        // getSum(4,7);
        //2.利用函数求任意两个数之间的和
        function getSum(num1,num2) {
            var sum = 0;
            for(var i = num1;i<=num2;i++){
                sum+=i;
            }
            console.log(sum);
        }
            getSum(1,100);
            //3.注意点
            //(1)多个参数之间用逗号隔开
            //(2)形参可以看做是不用声明的变量
    </script>
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